Rotary motor.



P171, DARLINGTON. ROTARY MOTOR. APPLICATION FILIED OCT. 20, I914.

Patented June 8, 1915.

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' ROTARY MOTOR.

APPLICATION FILED OCT. 20. 1914.

1,142,500. Patented June 8,1915.

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PHILIPVJ'. DARLINGTON, F HARTFORD, CONNECTICUT.

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l Specification of LettersPatent. Patented June 8 1915 Application filedOctober 20, 1914. Serial No. 867,626.

To all whom it may concern Be it known that'I. PHILIP J; DARLING- TON, acitizen of the United States, residing at Hartford, in the county ofHartford and State of Connecticut, have invented new and usefulImprovements in Rotary Motors, of which the following is aspecification.

This invention relates to rotary motors of the type employed for drivingboiler tube cleaners.

The object of the invention 'is to simplify and cheapen the constructionof motors of this class and at the same time increase their efficiencyand render them longer lived and more easily repaired when the wearingparts become worn.

The invention is applicable to water, steam and air driven motors,although it is illustrated and described herein as embodied in a waterdriven machine.

In the accompanying drawings Figure 1 shows a central longitudinalsection of a motor constructed according to this invention. Fig. 2 is aview of the rear end of the motor. Fig. 3 is atransverse section on line33 on Fig. 1. Fig. 4 is a transverse section on line 44 on Fig. '1. Fig.5 is a longitudinal section of the rear bearing bush. Fig. 6 is a sideview "showing parts of the front end of the frameand therotary'elementor rotor. Fig. 7 shows a side view of the rotor shaft and a section of arear hearing of modified form. l

The frame 1 of the motor shown has a cylindrical body 2 with a shaftchamber 4 which is closed at the rear end by the wall 5. Around the openor front end of the body is an external flange 3. The .rotor shaft 6 hasa journal portion 7 of large diameter near its front end and a journalportion 8 of smaller diameter at its rear end. On the shaft in front ofthe rear journal portion is a collar 9. Roller bearings 10 support theshaft at the front end and roller bearings 11 support the shaft at therear end. The front bearings are held in a bushing 12 which isforcedinto an enlarged part 13 of the shaft chamber at the front end of theframe, and the rear bearings are held in a bushing 14 which fits in atapering seat 15 in the shaft chamber at the rear end.

The rear bushing is desirably held in place by a pin 16 which passesthrough a boss 17 on the frame into an opening 18 in the bushing. Thispin can be tapered as shown so as to insure a tight joint, and its outerend 19 maybe threaded to receive a tool by means of which it'can beremoved. A split collar 20 may be placedaroun'd the shaft in front ofthe collar 9 and fastened in the rear bushing by means of the 'pin'23.Any forwardprcssureagainst the shaft is resisted by the thrust of thecollar 9 against the collar 20, which is held from forward movement bythe internal flange '21 near'thc front end of the rear bushing. A washer22 is placed in the frame so as to form a seat at the rear end of theshaft chamber. The internal diameter of the flange 21 in the rearbushing is slightly larger than the diameter of the large journalportion of the shaft so that the rear hearing may be located on the rearend of the shaft by passing it back over the'front end of the shaft.' Asleeve 24 is desirably placed in the frame between the front and rearbearings for the purposeof spacing them and keeping them in place. Thebore or inside diameter of the forward bushing is slightly larger thanthe outside diameter of the rear bushing so that when the holding pin 16is withdrawn the shaft bearings and rear bushing. in fact all of thecontents of the frame. may be drawn out at the front end withoutdisturbing the forward bushing.

The end of an oil tube 25 may be inserted centrally into the wall 5 atthe rear end of the shaft chamber. This tube communicates through a hole26 in the washer to the rear end of the shaft chamber in such mannerthat oil may be inserted so as tolubricate the bearings. The rear end ofthe oil tube is normally closed by a plug 28 which may be tapered sothat it will make atight joint and may be held in place against loss bythe tension of a spiral spring 29.

The front end of the shaft 31 is threaded as usual for the purpose ofreceiving the tool to be driven. The wheel 33, which in the drawings isillustrated as a turbine wheel. is keyed upon the shaft near the frontend. This wheel has turbine buckets formed by cutting grooves 34 of theproper shape in its periphery and by surrounding these with a band 37.Jet ports 38 are formed in the peripheral edge of the flange at thefront end of the frame. These ports are closed in by a tubular shield 39which is fitted on the front endofthe frame and which extends forwardlyover the rotor element. The shield 39 has inwardly projecting lugs 40which engage the rear face of the flange 3 and hold the shield fromforward movement. The opening in the front end of the shield is enlargedto a shoulder 42 that is flush with the front face of the flange 3, sothe band 37 will not obstruct the jet ports. On a reduced portion 43 atthe rear end of the shield and abutting against the shoulder 44 is thefront end of a casing. 45. Fitting into the rear end of this casing isthe reduced front end 47 of the cap 46, a hardened ring 49 beingplacedaround this cap between the shoulder 60 and the end of the casing,to form a protectionfor the rear end of'the motor when in use. Thecap/46 is screwed onto the hub 48 that projects backward from the rearend of the frame and which has openings 50 for the passage through thehub of the operating fluid. The cap is internally threaded for theattachment of a fluid supply pipe. In the modification illustrated inFig. 7 the rear bushing 53 is shown as containing thrust balls 55arranged between the internal flange 54 in the bushing and the collar 57on the shaft 56. This shaft also has a collar 58 arranged at the rearend of the journal portion 7 for the purpose of preventing thelongitudinal displacement of the front bearings, this collar performingthe function of the sleeve 24 shown in Fig. 1. The collar 57 is slightlysmaller in diameter than the bore of the' flange 54 so that the bushing53 may be slipped over the end of the shaft 56 until the balls can bedropped into place. Then the bushing is pushed backwardly so as to holdthe balls.

The invention claimed is 1. A rotary motor having a frame with acylindrical chamber that is closed at the rear end and is open at thefront end, a bearing bush located at the rear end of said chamber, abearing bush located at the front end of said chamber, said latter bushhaving an interior diameter that is larger than the exterior diameter ofthe former bush, bearings arranged in said bushes, a shaft supported bysaid bearings and a rotary element fixed to said shaft.

2. A rotary motor having a frame with a cylindrical chamber that isclosed at the rear end and is open at the front end, a rotary element, ashaft carrying said element, and

bushings in the chamber in the frame supporting said shaft near itsfront and rear ends, the inside diameter of the front bushing beinglarger than the outside diameter of the rear bushing.

3. A rotary motor having a frame with a cylindrical chamber closed atthe rear end by an integral wall and open at the front end, a rotaryelement, a shaft carrying said rotary element, and bushings rotatablysupporting said shaftrnear its front and rear ends, the inside diameterof the front bushing beinglarger than the outside diameter of the rearbushing.

4. A rotary motor having a frame with a cylindrical chamber closed atthe rear end and open at the front end, a rotary element, ashaftcarrying said rotary element, a rear bushing supporting the rear end ofsaid shaft, and a front bushing supporting the front end of said shaft,said front bushing having an interior diameter that is larger than theexterior diameter of the rear bushing, whereby the rear bushing may bewith drawn from the frame through the front end without disturbing thefront bushing.

5. A rotary motor having a frame with a chamber that is larger indiameter at the front end than at the rear end, a bushing fitting thelarger opening at the front end, a bushing fitting the smaller openingat the rear end, the exterior diameter of the latter bushing beingsmaller than the interior diameter of the former bushing, bearings heldin said bushings, ashaft mounted in said bearings, and a rotary elementfixed to said shaft.

In testimonywhereof I have signed my name to this specification in thepresence of two subscribing witnesses this 15th day of October, 1914.

PHILIP J. DARLINGTON.

